Studies of hydrothermal gold deposition (I). Carlin gold deposit, Nevada: The role of carbonaceous materials in gold deposition
Arthur S. Radtke, Bernard J. Scheiner
1970, Economic Geology (65) 87-102
Studies of fresh carbonate host rocks and unoxidized gold ores of the Carlin mine indicate that gold, quartz, barite, pyrite, and other sulfides were introduced into the Roberts Mountains Formation by acid hydrothermal solutions. Laboratory investigations on the carbonaceous materials in the host rocks and...
Comparative hydrogeology: An example of its use
Harry E. LeGrand
1970, Bulletin of the Geological Society of America (81) 1243-1248
As a start toward needed classifications of hydrogeologic settings, a type of setting is described. The setting includes areas where soluble materials are exposed to considerable recharge from precipitation and where both the topographic relief and permeability are inappreciable. Typical areas of this setting are (1) the Black Belt of...
Green River oil shale—concept of origin extended: An interdisciplinary problem being attacked from both ends
W. H. Bradley
1970, GSA Bulletin (81) 985-1000
A much fuller understanding of the Green River oil shale and its organic chemistry will emerge when the geologists, paleontologists, organic chemists, biologists, paleolimnologists, and biogeochemists, who are now working on it, integrate their findings with those of the others.We know from the geology, paleontology, and paleolimnology that the biologic...
Control of pH in MS-222 anesthetic solutions
John L. Allen, Paul D. Harman
1970, Progressive Fish-Culturist (32) 100-100
No abstract available. ...
Unusual pathogenicity of a common metacercaria of fish
G. L. Hoffman, J.A. Hutcheson
1970, Journal of Wildlife Diseases (6) 109-109
No abstract available. ...
Observations of iceberg rafting in Glacier Bay, Alaska, and the identification of ancient ice-rafted deposits
A. Thomas Ovenshine
1970, Bulletin of the Geological Society of America (81) 891-894
Observations of icebergs in a modern glacial marine environment indicate that ancient rocks that received iceberg-rafted material should contain: (1) local concentrations of stones that originated when icebergs overturned, and (2) small pellets of till that were originally sediment filling the spaces between clear ice crystals.The till pellets are especially...
Distribution of the Toquima-Table Head (Middle Ordovician Whiterock) Faunal Realm in the Northern Hemisphere
Reuben James Ross Jr., J. Keith Ingham
1970, Bulletin of the Geological Society of America (81) 393-408
Discovery of a Whiterock trilobite assemblage in the Albany Mudstone, Girvan District, southwestern Scotland, led to an assessment of the distribution of Middle Ordovician brachiopod and trilobite faunas previously assigned to the White-rock Stage of Cooper (1956).These faunas lie within a belt designated as the Toquima-Table Head Faunal Realm. This...
Environmental conditions and resources of southwestern Mississippi
U.S. Geological Survey
1970, Report
The impending phase-out of Saturn V testing by the National Aeronautics and Space Administration at the Mississippi Test Facility (MTF) necessitates consideration of possible alternative uses for the Facility and surrounding region. To make a rapid and up-to-date study of pertinent environmental factors in that region, remote sensing techniques and...
Origin of the disturbed belt in northwestern Montana
Melville R. Mudge
1970, Article
The northern part of the disturbed belt in Montana is a northwesterly trending zone of closely spaced westerly dipping thrust faults, many folds, and some longitudinal normal faults and transverse faults. The theory of vertical uplift that results in gravitational gliding is a reasonable explanation of the origin of the...
Wildlife imported into the United States in 1969
U.S. Bureau of Sport Fisheries and Wildlife
1970, Wildlife Leaflet 491
No abstract available....
Physical characteristics of the lunar regolith determined from surveyor television observations
Eugene Merle Shoemaker, E. C. Morris
1970, Radio Science (5) 129-155
The new data on the physical characteristics of the lunar surface derived from the Surveyor pictures can be fitted to a simple ballistic model for the origin and development of the lunar regolith. At a given locality, the size-frequency distributions of craters on the lunar surface can...
Effects of local geology on ground motion near San Francisco Bay
Roger D. Borcherdt
1970, Bulletin of the Seismological Society of America (60) 29-61
Measurements of ground motion generated by nuclear explosions in Nevada were made for 37 locations near San Francisco Bay, California. The results were compared with the San Francisco 1906 earthquake intensities and the strong-motion recordings of the San Francisco earthquake of March 22, 1957. The recordings show marked amplitude variations...
Variations of major chemical constituents across the central Sierra Nevada batholith
P. C. Bateman, F. C. W. Dodge
1970, Bulletin of the Geological Society of America (81) 409-420
A study of 193 chemical analyses of plutonic rocks from 132 localities in the central Sierra Nevada shows convincingly that K2O decreases systematically westward and suggests that Fe2O3 and TiO2 may also decrease westward and that FeO, MgO, and CaO may increase. The ratio K2O/SiO2 obviously decreases westward across six of eight provisionally...
Petrogenesis of mylonites of high metamorphic grade in the Peninsular Ranges of southern California
Ted G. Theodore
1970, Bulletin of the Geological Society of America (81) 435-449
A fairly continuous, narrow belt of mylonite gneisses extends approximately 60 miles across southern California and crops out prominently at Coyote Mountain, near Borrego Springs, San Diego County. At Coyote Mountain, both prebatholithic rocks and igneous rocks lithologically similar to rocks from the nearby southern...
Sedimentary volumes and their significance
James Gilluly, John C. Reed Jr., Wallace M. Cady
1970, Bulletin of the Geological Society of America (81) 353-375
Sedimentary volumes are of prime interest in many fields of geology: as measures of erosional rates, of geochemical balance, and recently, with the virtual demonstration of continental drift, as measures of movement of the continental and oceanic plates.The Basement Map of the United States, published by the U.S. Geological Survey...
Nuclear methods applied to uranium geochemistry
J. N. Rosholt
1970, IEEE Transactions on Nuclear Science (17) 173-176
Stable and radioactive daughter products produced from nuclear disintegrations of uranium have proved useful in fundamental studies of the geochemistry of uranium in igneous rock and sedimentary environments and in ore deposits. Information gained from geochemical studies of uranium migration has been used to develop models...
Emission spectrographic determination of trace elements in lunar samples
C. Annell, A. Helz
1970, Science (167) 521-523
Eighteen minor or trace elements were detected and determined by emission spectroscopy. Direct d-c arc excitation of powdered samples was used with three variations in the procedure. Thirteen lunar samples consisting of four fine-grained igneous rocks, one medium-grained igneous rock, seven breccias, and one sample of fines were analyzed. The...
Lunar troilite: Crystallography
H. T. Evans Jr.
1970, Science (167) 621-623
Fine, euhedral crystals of troilite from lunar sample 10050 show a hexagonal habit consistent with the high-temperature NiAs-type structure. Complete three-dimensional counter intensity data have been measured and used to confirm and refine Bertaut's proposed low-temperature crystal structure....
Crystallography of some lunar plagioclases
D. B. Stewart, D.E. Appleman, J.S. Huebner, J. R. Clark
1970, Science (167) 634-635
Crystals of calcic bytownite from type B rocks have space group I1 with c ≈ 14 angstroms. Bytownite crystals from type A rocks...
Petrology of unshocked crystalline rocks and shock effects in lunar rocks and minerals
E. C. T. Chao, O.B. James, J.A. Minkin, J.A. Boreman, E.D. Jackson, C.B. Raleigh
1970, Science (167) 644-647
On the basis of rock modes, textures, and mineralogy, unshocked crystalline rocks are classified into a dominant ilmenite-rich suite (subdivided into intersertal, ophitic, and hornfels types) and a subordinate feldspar-rich suite (subdivided into poikilitic and granular types). Weakly to moderately shocked rocks show high strain-rate deformation and solid-state transformation of...
Lunar soil: Size distribution and mineralogical constituents
M.B. Duke, C.C. Woo, M. L. Bird, G.A. Sellers, R. B. Finkelman
1970, Science (167) 648-650
The lunar soil collected by Apollo 11 consists primarily of submillimeter material and is finer in grain size than soil previously recorded photographically by Surveyor experiments. The main constituents are fine-grained to glassy rocks of basaltic affinity and coherent breccia of undetermined origin. Dark glass, containing abundant nickel-iron spheres, coats...
Thermoluminescence of lunar samples
G. B. Dalrymple, Richard R. Doell
1970, Science (167) 713-715
Appreciable natural thermoluminescence with glow curve peaks at about 350 degrees centigrade for lunar fines and breccias and above 400 degrees centigrade for crystalline rocks has been recognized in lunar samples. Plagioclase has been identified as the principal carrier of thermoluminescence, and the difference in peak temperatures indicates compositional or...
Age of the moon: An isotopic study of uranium-thorium-lead systematics of lunar samples
M. Tatsumoto, J.N. Rosholt
1970, Science (167) 461-463
Concentrations of U, Th, and Pb in Apollo 11 samples studied are low (U. 0.16 to 0.87; Th, 0.53 to 3.4; Pb, 0.29 to 1.7, in ppm) but the extremely radiogenic lead in samples allows radiometric dating. The fine dust and the breccia have a concordant age...
Lunar rock compositions and some interpretations
A.E.J. Engel, C.G. Engel
1970, Science (167) 527-528
Samples of igneous "gabbro," "basalt," and lunar regolith have compositions fundamentally different from all meteorites and terrestrial basalts. The lunar rocks are anhydrous and without ferric iron. Amounts of titanium as high as 7 weight percent suggest either extreme fractionation of lunar rocks or an unexpected solar abundance of titanium....
Specific heats of lunar surface materials from 90 to 350 degrees Kelvin
R. A. Robie, B. S. Hemingway, W.H. Wilson
1970, Science (167) 749-750
The specific heats of lunar samples 10057 and 10084 returned by the Apollo 11 mission have been measured between 90 and 350 degrees Kelvin by use of an adiabatic calorimeter. The samples are representative of type A vesicular basalt-like rocks and of finely divided lunar soil. The...
